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Quote from xpstrader:
November 12, 2002
IB Notification
US Options Cancellation Fees
Dear IB Trader:
Recently the US Options Exchanges imposed fees for the cancellation or
modification of option orders. As such, IB needs to pass these fees on
to our customers. Effective Wednesday, November 13th, IB will charge
$1.20 for each US directed option order cancel or modification. This fee
will not apply to smart routed orders. For each option order that is
executed during the day, IB will provide a credit of $1.20 against the
cancellation/modification fees for the day.
Interactive Brokers